from rest_framework import serializers
from goods.models import SPU, Brand, GoodsCategory


class SPUGoodsSerializer(serializers.ModelSerializer):
    """
        SPU表序列化器
    """
    # 一级分类id
    category1_id = serializers.IntegerField()
    # 二级分类id
    category2_id = serializers.IntegerField()
    # 三级级分类id
    category3_id = serializers.IntegerField()
    # 关联的品牌id
    brand_id = serializers.IntegerField()
    # 关联的品牌，名称
    brand = serializers.StringRelatedField(read_only=True)

    class Meta:
        model = SPU
        exclude = ('category1', 'category2', 'category3')


class SPUBrandsSerializer(serializers.ModelSerializer):
    """
        SPU表品牌序列化器
    """

    class Meta:
        model = Brand
        fields = "__all__"


class CategorysSerializer(serializers.ModelSerializer):
    """
        SPU表分类信息获取序列化器
    """

    class Meta:
        model = GoodsCategory
        fields = "__all__"

